So...if I got it correctly, you are seeing seepage around the tappet/valve cover, both the bolts as well as the gasket area.
1st, check the tightness/torque of the alan bolts. IIRC there are 10.(14?)
If they are all tight, then you will need to replace the cover gasket and the donut washers under the alan bolts. Usually a little gasket cement on one side (cover side) is also in order. (Helps keep the gaskets on the cover when you remove for setting valves.)
Check for loose bolts first. Then wash the area and see if the leaks come back.